| 摘要 |
PROBLEM TO BE SOLVED: To provide a ventilator excellent in rigidity and processability as a support material, and reducing noise, and a manufacturing method thereof.SOLUTION: In a ventilator 10, on the other end side of a hollow support material 3 of which one end side is fixed to a support plate 4, an electric motor 2 for driving an impeller 1 is attached; and the support material 3 constitutes a Helmholtz resonance body.SELECTED DRAWING: Figure 4 |
